Wilson 700 - 2700 MHz Wideband 50 Ohm directional antenna is ideal for use with dual band for Nextel/iDen applications and is made of aluminum for durability.Wilson 700 - 2700 MHz Wideband 50 Ohm directional antenna is uni-directional and mounts on the poles of size 2" Dia. Antenna works with 50 Ohm amplifiers and operates at the frequency range of 700-2500 MHz.